Hydraulic weight indicator



April 16, 1935. 1,997,864

HYDRAULI C WEI GHT I NDI CATOR Filed May 22, 1931 2 Sheets-Sheet 1 Inwemar wwww By 5M dtlomeys is tees i,97,86

Eur OFFICE HYDRAULIC WEIGHT MDICATOR Frank Fletcher Hill, Los Angeles,Calli.

Application May 22, 1931, Serial No. 539,235

4% Claims. (Cl. 2635-47) This invention relates to hydraulic weight in-The outer ends of the pin 8 pass through eyes lll dicators for use inconnection with the apparatus of the hook bails l l to pivet y supportthe hook employed in carrying out the rotary process of H2. The hook l2may be of any suitable or dedrilling oil wells. sirable construction andis herein diagrammatig It is an object of this invention to provide aCally illustrated as a rotary spring o hydraulic weight indicatingdevice for indicating In order to p v ipp n of he cylinder 6 the weightimposed upon the drill utilized in drilland to provide a 4D for theCylinder extension ing a well, which indicating device is constructed ap i3 is Provided Which is formed h as an integral portion of thesuspending mechastops M which extend on opposite sides of one no nismutilized in suspending the drill stem in th of the bails 3 to preventrotation of the cylinder derrick. extension 6 or the cross head l on thetrunnions Another object of this invention is to provide 5 thereof- Thep l3 is secured be the pp a hydraulic weight indicating device includinga end o the y d extension y means of p cylinder supported in a travelingblock having a bolts l5 which are threaded to the cylinder exld Pistonmounted therein which is secured to the tension 6 to pa through the p 1"bails of the suspending hook and which piston T e plunger 7 is p d dwith a sealing ring is supported on a. fluid so that the weight imhereinillustrated as comprising a flexible packposed upon the traveling blockmay be indicated l g rin 16 d in position by means of a from thepressure developed in such fluid. taining ring H secured to the lowerface of the Other objects and advantages of this invenp un er 7 y meansof a plurality of Cap bolts 20 tion it is believed will be apparent fromthe foll8 spaced around the ring H and threaded to lowing detaileddescription of a preferred emthe plunger 1. A split ring I9 is carriedin an bodiment thereof as illustrated in the accomannular groove 20formed in the ring H in posip y d gs. tion to expand outwardly to forcethe packing In the drawings: ring it against the wall of the cylinder 6.25

Figure 1 is a side elevation of a combined trav- In order to registerthe pressure imparted to cling block and hook structure including ahythe fluid 24 within the cylinder 6, a port is draulic weightindicating means embodying my formed through the wall of the cylinder 6and is invention. connected by means of a fitting 2! with a flexibleFigure 2 is an edge elevation partly in section hose 22 leading to agauge 23. The gauge 23 30 thereof. may be positioned in any suitable ordesirable Figure 3 is an enlarged fragmental sectional position withinthe derrick at a place where it view of the hydraulic weight indicatingdevice may be readily observed by the operator of the embodying myinvention. drilling mechanism.

In the preferred embodiment of my invention Having fully described myinvention, it is to 35 illustrated in the a o p y wings, I inbeunderstood that I do not wish to be limited diestes a r v n block overwhich the cable is to the details herein set forth, but my inventiontrained from the crown block of an oil well deri of the full scope ofthe appended claims. rick. The traveling block I is provided with a Iclaim:

40 transversely extending supporting end 2 upon 1. In a hydraulic weightindicating device, 40

which bl ck bails 3 are p fl y mellhtedhe the combination of a pivotallymounted crosslower end o the block balls 3 are Connected head, acylindersupported by the cross-head and together by means of a cross h ad 4 h cis DiV- having a pair of diametrically opposed elongated otally mountedby trunnions 5 in the lower eyes slots, at plunger mounted within thecylinder,

of the balls 3. a cap for the cylinder, the cap being provided Formedintegral with the cross head 4 is a with means for restricting thepivotal movement ylinder 6 within which a plunger or piston 7 is of thecross-head, a pin passed transversely mounted. Positioned in thecylinder 6 below through the plunger and extending through the theplunger 7 is a volume of fluid 24 such, for eX- elongated slots formedin the cylinder, and sus- 5', ample, as oil upon which the plunger 7 issuppension bails mounted on the opposed ends of ported. The plunger 1 ispositioned within the the pin.

' cylinder 6 to move vertically. The plunger 1 is 2. In a hydraulicweight indicating device, the provided with a transversely extending pin8 combination of a pivotally mounted cross-head, which extends throughelongated slot 9 formed a cylinder supported by the cross-head andthrough the wall of the cylinder extension 6 having a pair of elongatedslots, a plunger 5 restricting the pivotal movement of the crosshead, apin passed transversely through the plunger and extending through theelongated slots formed in the cylinder, suspension bails mounted on theopposed ends of the pin, and a port formed through the cylinder incommunication with a volume of fluid confined in the cylinder to which aweight registering means is adapted to be coupled.

3. In a hydraulic weight indicating device, the combination of apivotally mounted cross-head, a cylinder supported by the cross-head andhaving a pair of diametrically opposed elongated slots, a plungermounted Within the cylinder, 2. cap for the cylinder, means forrestricting the pivotal movement of the cross-head, a pin passedtransversely through the plunger and extending through the elongatedslots formed in the cylinder, and a suspension bail mounted on theopposed ends of the pin.

4. In a hydraulic weight indicating device, the combination of apivotally mounted cross-head, a cylinder supported by the cross-head andhaving a pair of elongated slots, a plunger mounted within the cylinder,a cap for the cylinder, means for restricting the pivotal movement ofthe crosshead relative to the cylinder, a pin passed transverselythrough the plunger and extending through the elongated slots formed inthe cylinder, suspension bails formed on the opposite ends of the pin,and a port formed through the cylinder in communication with a volume offluid confined in the cylinder to which a weight registering means isadapted to be coupled.

FRANK FLETCHER HILL.

